the system game the option and quantity of btc which is processed and confirmed as success when i transfered.
Kraken says contact coinbase..and coinbase is not interested
Well, Coinbase will never give you the private key, so you can't retrieve the BTH yourself. If they are not willingly to help you retrieve them now, you just have to wait until 01.01.2018, when they officially support BTH.
If that is the case I suggest you submit a request to them now and claim the BTH, so when the time comes they have your ticket open and can help you retrieve them.